Factual error: 1-1 A couple of spelling errors. A "community center" in Ceylon, a British colony, using the American instead of the British spelling. And Columbo listed as the capital of Ceylon; it's Colombo.
The Heart of Lord Trash - S1-E10
Factual error: Bulstrode refers to Elizabeth I. Since it's the 1930s, there's only been one Queen Elizabeth. She didn't become Elizabeth I until Elizabeth II acceded to the throne in 1952.
The Heart of Lord Trash - S1-E10
Factual error: In the prologue, Captain Dance wears two and half rings of braid around his cuff. A British Army captain, which uniform he wears, wore two rings.